The potato doughnut, sometimes called a Spudnut, is a doughnut, typically sweet, made with either mashed potatoes or potato starch instead of flour, the most common ingredient used for doughnut dough. Potato doughnuts were introduced in the mid-1900s, and a recipe was published in 1938. Potato doughnuts tend to be lighter than flour doughnuts, and are prepared in a similar method to other doughnuts. A chain of Spudnut Shops was established across the United States in the 1950s before declining to a few dozen more recently. Fried ube dough is also eaten in East Asia. Much like flour doughnuts, potato doughnuts are often accompanied with coffee.